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利用新型高效的双极性脉冲放电等离子体水处理技术对常用有毒阻燃剂四溴双酚A(tetrabromobisphenol A,TBBPA)进行了降解试验。研究了在双极性脉冲放电不同条件包括放电电压、气体体积流量,填料球粒径,溶液电导率,TBBPA溶液初始质量浓度以及负载TiO2光催化剂等对TBBPA的降解效果。实验结果表明:双极性脉冲放电等离子体系对TBBPA有着良好的降解效果。放电电压越高,降解效果越好;在一定范围内,气量变小,降解效果更好;填料球粒径越小,降解效果越优;溶液电导率越小,TBBPA去除率越高;负载TiO2光催化剂能够明显提升放电等离子体对TBBPA的降解效果。在降解过程中,TBBPA被分解为小分子,并且存在脱溴环节。
The degradation of tetrabromobisphenol A (TBBPA), a commonly used toxic flame retardant, was investigated by a novel and highly efficient bipolar pulse plasma discharge plasma treatment. The degradation of TBBPA was investigated under different conditions of bipolar pulsed discharge, including discharge voltage, gas volume flow rate, particle size of filler, conductivity of solution, initial concentration of TBBPA solution and loading TiO2 photocatalyst. The experimental results show that the bipolar pulse discharge plasma system has a good degradation effect on TBBPA. The higher the discharge voltage, the better the degradation effect. Within a certain range, the gas volume becomes smaller and the degradation effect is better. The smaller the diameter of the filler particles, the better the degradation effect. The smaller the conductivity of the solution is, the higher the TBBPA removal rate is. Photocatalyst can significantly improve the discharge plasma of TBBPA degradation. During degradation, TBBPA is broken down into small molecules and debromination is present.